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wangshitong
Òø³æ (СÓÐÃûÆø)
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- ½ð±Ò: 1687.4
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- Ìû×Ó: 214
- ÔÚÏß: 219.1Сʱ
- ³æºÅ: 439970
- ×¢²á: 2007-10-26
- רҵ: ÉúÎҽѧ¹â×Óѧ
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˵µÄÔÙ¾ßÌåһϡ£ ÏÂÃæÊÇÎÒËѵ½µÄÒ»¸ö³ÌÐò£¬ÕâÀïÃæµÄ²ÎÊýÓ¦¸ÃÔõôÉèÖÃÄØ£¿ÓÐÓùýÕâ¸ö³ÌÐòµÄ´óÏÀÂð£¿ÇëÇóÖ¸µ¼£¬Ð»Ð»£¡ %[h,I]=ihat(H,k,r,n;I) %--------------------- % %Inverse Hankel transform of order n. % %Input: % H Spectrum K(k) % k Spatial frequencies [rad/m] {pi/numel(H)*(0:numel(H)-1)} % r Radial positions [m] {0:numel(H)-1} % n Transform order {0} % or % I Integration kernel � {default} % %Output: % h Signal h(r) % I Integration kernel % % % � If the integration kernel is missing, it is % recomputed from the Bessel functions (slow). % % Marcel Leutenegger �June 2006 % function [h,I]=ihat(H,k,r,n) if sum(size(H) > 1) > 1 error('Spectrum must be a vector.'); end if nargin < 2 | isempty(k) k=pi/numel(H)*(0:numel(H)-1).'; else [k,w]=sort(k( );H=H(w); end if nargin < 3 | isempty(r) r=0:numel(H)-1; end if nargin < 4 | isempty(n) n=0; end if numel(n) > 1 if exist('w','var') I=n(w, ;else I=n; end else I=besselj(n,k*r( .');end h=reshape(frdr(H,k).'*I/(2*pi)^2,size(r)); |
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